public void Invalidate_OfCacheableClassWhenCalledInvalidatedAndCalledAgain_ReturnsSecondCachedValue()
{
// Arrange
int cachedValue = 100;
AutoRefreshingItemCache <CacheableClass> cache = new AutoRefreshingItemCache <CacheableClass>(
new FakeLogger(),
(ct) => { cachedValue += 25; return(Task.FromResult(new CacheableClass(cachedValue))); },
null,
TimeSpan.FromMinutes(2)
);
CacheableClass cachedClass;
int actualResult;
int expectedResult = 150;
cache.Initialise();
// Act
_ = cache.GetItem();
cache.Invalidate();
TimeDelay.WaitFor(50);
cachedClass = cache.GetItem();
actualResult = cachedClass.GetValue();
// Assert
Assert.AreEqual(expectedResult, actualResult);
}
public void GetItem_OfCacheableStructRequestedMultipleTimesInSuccession_CallsRetrievalDelegateJustOnce()
{
// Arrange
CacheableStruct cacheableStruct = new CacheableStruct(125);
AutoRefreshingItemCache <CacheableStruct> cache = new AutoRefreshingItemCache <CacheableStruct>(
new FakeLogger(),
(ct) => { return(Task.FromResult(cacheableStruct.GetSelf())); },
new CacheableStruct(1000),
TimeSpan.FromMinutes(2)
);
int actualResult;
int expectedResult = 1;
cache.Initialise();
// Act
_ = cache.GetItem();
_ = cache.GetItem();
_ = cache.GetItem();
_ = cache.GetItem();
actualResult = cacheableStruct.NumberOfGetSelfCalls;
// Assert
Assert.AreEqual(expectedResult, actualResult);
}
public void GetItem_OfCacheableClassWhenCacheExpires_CallsRetrievalDelegateAgain()
{
// Arrange
AutoRefreshingItemCache <CacheableClass> cache = new AutoRefreshingItemCache <CacheableClass>(
new FakeLogger(),
(ct) => { return(Task.FromResult(new CacheableClass(125))); },
null,
TimeSpan.FromMilliseconds(100));
DateTime initialCreatedAt;
DateTime finalCreatedAt;
CacheableClass cacheItem;
cache.Initialise();
// Act
cacheItem = cache.GetItem();
initialCreatedAt = cacheItem.CreatedAt;
// Wait for the cache item to expire and then retry
TimeDelay.WaitFor(150);
cacheItem = cache.GetItem();
finalCreatedAt = cacheItem.CreatedAt;
// Assert that the creation values are different
Assert.AreNotEqual(initialCreatedAt, finalCreatedAt);
}
public void Invalidate_OfIntWhenCalledInvalidatedAndCalledAgain_ReturnsSecondCachedValue()
{
// Arrange
int cachedValue = 100;
AutoRefreshingItemCache <int> cache = new AutoRefreshingItemCache <int>(
new FakeLogger(),
new NonCloningClonerFactory <int>(),
(ct) => { cachedValue += 25; return(Task.FromResult(cachedValue)); },
0,
TimeSpan.FromMinutes(2)
);
int actualResult;
int expectedResult = 150;
cache.Initialise();
// Act
_ = cache.GetItem();
cache.Invalidate();
TimeDelay.WaitFor(50);
actualResult = cache.GetItem();
// Assert
Assert.AreEqual(expectedResult, actualResult);
}
public void GetItem_OfCacheableClassRequestedMultipleTimesInSuccession_CallsRetrievalDelegateJustOnce()
{
// Arrange
AutoRefreshingItemCache <CacheableClass> cache = new AutoRefreshingItemCache <CacheableClass>(
new FakeLogger(),
(ct) => { return(Task.FromResult(new CacheableClass(125))); },
null,
TimeSpan.FromMilliseconds(100));
DateTime initialCreatedAt;
DateTime finalCreatedAt;
CacheableClass cacheItem;
cache.Initialise();
// Act
cacheItem = cache.GetItem();
initialCreatedAt = cacheItem.CreatedAt;
_ = cache.GetItem();
_ = cache.GetItem();
cacheItem = cache.GetItem();
finalCreatedAt = cacheItem.CreatedAt;
// Assert
Assert.AreEqual(initialCreatedAt, finalCreatedAt);
}
public void GetItem_OfCacheableClassWhenCalledTwice_DoesNotReturnSameInstance()
{
// Arrange
AutoRefreshingItemCache <CacheableClass> cache = new AutoRefreshingItemCache <CacheableClass>(
new FakeLogger(),
(ct) => { return(Task.FromResult(new CacheableClass(125))); },
null,
TimeSpan.FromMilliseconds(100));
CacheableClass cacheItem1;
CacheableClass cacheItem2;
cache.Initialise();
// Act
cacheItem1 = cache.GetItem();
cacheItem2 = cache.GetItem();
// Assert that full, deep cloning is being performed
Assert.AreNotEqual(cacheItem1, cacheItem2);
Assert.AreNotEqual(cacheItem1.Child, cacheItem2.Child);
}
public void GetItem_OfCacheableClassWhenCalledTwice_CreatesPerfectClone()
{
// Arrange
AutoRefreshingItemCache <CacheableClass> cache = new AutoRefreshingItemCache <CacheableClass>(
new FakeLogger(),
(ct) => { return(Task.FromResult(new CacheableClass(125))); },
null,
TimeSpan.FromMilliseconds(100));
CacheableClass cacheItem1;
CacheableClass cacheItem2;
cache.Initialise();
// Act
cacheItem1 = cache.GetItem();
cacheItem2 = cache.GetItem();
// Assert that the clone worked correctly
Assert.AreEqual(cacheItem1.GetValue(), cacheItem2.GetValue());
Assert.AreEqual(cacheItem1.NumberOfCalls, cacheItem2.NumberOfCalls);
Assert.AreEqual(cacheItem1.CreatedAt, cacheItem2.CreatedAt);
}
public void GetItem_OfCacheableClassWhenInitialisationTimesOut_ReturnsInitialValueOfNull()
{
// Arrange
AutoRefreshingItemCache <CacheableClass> cache = new AutoRefreshingItemCache <CacheableClass>(
new FakeLogger(),
async(ct) => { await TimeDelay.WaitForAsync(500); return(new CacheableClass(100)); },
null,
TimeSpan.FromMinutes(2)
);
CacheableClass actualResult;
cache.StartInitialisation();
cache.TryCompleteInitialisation(TimeSpan.FromMilliseconds(50));
// Act
actualResult = cache.GetItem();
// Assert
Assert.IsNull(actualResult);
}
public void GetItem_OfCacheableStruct_ReturnsCorrectCachedValue()
{
// Arrange
CacheableStruct cacheableStruct = new CacheableStruct(125);
AutoRefreshingItemCache <CacheableStruct> cache = new AutoRefreshingItemCache <CacheableStruct>(
new FakeLogger(),
(ct) => { return(Task.FromResult(cacheableStruct)); },
new CacheableStruct(1000),
TimeSpan.FromMinutes(2)
);
int actualResult;
int expectedResult = 125;
cache.Initialise();
// Act
actualResult = cache.GetItem().GetValue();
// Assert
Assert.AreEqual(expectedResult, actualResult);
}
public void GetItem_OfInt_ReturnsCorrectCachedValue()
{
// Arrange
AutoRefreshingItemCache <int> cache = new AutoRefreshingItemCache <int>(
new FakeLogger(),
new NonCloningClonerFactory <int>(),
(ct) => { return(Task.FromResult(125)); },
0,
TimeSpan.FromMinutes(2)
);
int actualResult;
int expectedResult = 125;
cache.Initialise();
// Act
actualResult = cache.GetItem();
// Assert
Assert.AreEqual(expectedResult, actualResult);
}
public void GetItem_OfIntWhenInitialialisationTimesOut_ReturnsInitialValueOfZero()
{
// Arrange
AutoRefreshingItemCache <int> cache = new AutoRefreshingItemCache <int>(
new FakeLogger(),
new NonCloningClonerFactory <int>(),
async(ct) => { await TimeDelay.WaitForAsync(500); return(125); },
0,
TimeSpan.FromMinutes(2)
);
int actualResult;
int expectedResult = 0;
cache.StartInitialisation();
cache.TryCompleteInitialisation(TimeSpan.FromMilliseconds(50));
// Act
actualResult = cache.GetItem();
// Assert
Assert.AreEqual(expectedResult, actualResult);
}
/// <summary>
/// Get the list from the underlying cache
/// </summary>
/// <returns>The disallowed fragment list returned by the cache</returns>
public DisallowedFragmentList GetDisallowedFragmentList()
{
return(_cache.GetItem());
}
/// <summary>
/// Get the list from the underlying cache
/// </summary>
/// <returns>The character set list returned by the cache</returns>
public CharacterSetList GetCharacterSetList()
{
return(_cache.GetItem());
}